import java.util.Scanner;



public class MyDCTester {

    public static void main(String[] args) {

        String expression, again;

        int result;

        try {

            Scanner in = new Scanner(System.in);

            do {

                MyDC evaluator = new MyDC();

                System.out.println("Enter a valid postfix expression: ");

                expression = in.nextLine();

                result = evaluator.evaluate(expression);

                System.out.println();

                System.out.println("That expression equals " + result);



                System.out.print("Evaluate another expression [Y/N]? ");

                again = in.nextLine();

                System.out.println();

            }

            while (again.equalsIgnoreCase("y"));

        } catch (Exception IOException) {

            System.out.println("Input exception reported");

        }

    }

}

